Manual: Speed Sensor MSPEED
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1.
Introduction
MSPEED is a sensor which measures the speed of a flying model through the air, to provide the
indicated airspeed (IAS). The reporting of airspeed can be very instructive with regard to the control
of a flying model, for example allowing the pilot to determine the models stall speed and set an alarm
to indicate when the model falls below this speed. Another function of the sensor is to allow the pilot
to set a desired speed and a step above or below this speed at which an acoustic signal should be
sounded by the transmitter module. To facilitate easier reading of the indicated airspeed, a bar graph
is displayed marking the appropriate configured steps. The measurement of airspeed is based on the
principle of change in dynamic pressure, measured by a pitot tube, which is connected by silicon
tubing. With the help of the wireless Duplex system, this sensor information can be reported to the
pilot in realtime, allowing immediate feedback in airspeed changes and a deviations from the
configured steps.
2.
Description
MSPEED consists of a base unit and a pitot tube with static pressure measurement, connected by
silicone hoses. The base unit includes the sensor for measuring the relative pressure with two
entrances. One entrance is marked red and other is clear. The pitot tube has two corresponding exists,
one marked red, the other not. To ensure correct operation, the red tube should be connected between
the base unit and the pitot using the marked input/output. The clear tube should be connected
between the unmarked input/outputs.
3.
Connecting MSPEED
The base unit features two three-wire cables. The cable with the red JR plug, marked INPUT
provides control signals to the unit. The other cable marked EXT (black plug) allows data transfer
between the sensor and the Duplex system or the Jeti Box.